Catalyst for preparing 1,3-propanediol by hydrogenation of lactic aldehyde

Abstract

The present invention relates to a catalyst for 3-hydroxypropanal hydrogenation to prepare 1,3-propylene glycol. Its active component is Ni-A, in which A is any one of Cr, Zn, Mo or Fe, the weight ratio of Ni and A is: Ni:A=1:0.01-1:0.1, its carrier is molecular sieve containing Al2O3 or SiO2 or containing both them, and the weight percentage content of active component of catalyst is 30-60%. Said catalyst can help to form high-activity nickel alloy cluster active centre, and can effectively modify pore channel of catalyst, and is favorable for diffusion of 3-hydropropanal so as to greatly raise the activity of catalyst.

Description

technical field

[0001] The invention relates to a catalyst for preparing 1,3-propanediol through hydrogenation of 3-hydroxy propionaldehyde. The active component of the catalyst contains Ni and Cr, Zn, Mo or Fe. Background technique

[0002] 1,3-propanediol is a compound with a wide range of uses. In addition to being used in the production of polyurethane and cyclic compounds, it is also the main monomer of poly(1,3-trimethylene terephthalate) fibers. Polypropylene terephthalate fiber is a polyester variety with excellent performance. Although it has come out in the 1950s, because 1,3-propanediol cannot be industrialized, it makes polypropylene terephthalate 1,3-propylene glycol The development of ester fibers has been stagnant for many years. In recent years, with the success of industrial production of 1,3-propanediol, the development and application of poly(1,3-trimethylene terephthalate) fiber has attracted attention again. At present, the hydration of acrolein to 3-h...